CVE-2020-8794
9.8 · CRITICALOverview
CVE-2020-8794 is a critical-severity vulnerability affecting opensmtpd opensmtpd. It was published on February 25, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
Remediation
Check the references section for vendor advisories and patches from opensmtpd. Update opensmtpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| opensmtpd | opensmtpd | >= 0, < 6.6.4 | Affected |
References
Frequently Asked Questions
What is CVE-2020-8794?
CVE-2020-8794 is a critical-severity vulnerability affecting opensmtpd opensmtpd. It was published on February 25, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2020-8794?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-8794?
Check the references section for vendor advisories and patches from opensmtpd. Update opensmtpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-8794?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-8794 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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